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故障现象一辆行驶里程约为10万km的奥迪A6 1.8T轿车(装备01V自动变速器),车主反映该车排黑烟,急加速不畅且有“嘟嘟”声。故障诊断维修人员接车后分析认为,导致该车排气冒黑烟的原因是混合气过浓,没有充分燃烧。于是用VAS5051读取相关测量数据,发现空气流量传感器(G70)的数据为2.9g/s~4.2g/s,正常;检查氧传感器时发现λ调节值逐渐达到30%左右(正常应为15%~3%,手册规定范围为-10%~+10%),明显偏高,这种情况只有氧传感器不工作时才会出现;喷油
Fault phenomenon A mileage of about 100,000 km Audi A6 1.8T sedan (equipped with 01V automatic transmission), the owner reflects the car row of black smoke, rapid acceleration and have a “beep” sound. Fault diagnosis and maintenance personnel take the car after the analysis that led to the car exhaust black smoke because the mixture is too thick, not fully burned. So with VAS5051 read the relevant measurement data and found that the air flow sensor (G70) data 2.9g / s ~ 4.2g / s, normal; check the oxygen sensor and found that the λ adjustment gradually reaches 30% (normal should be 15% ~ 3%, the manual provides the range of -10% ~ + 10%), significantly higher, this situation will only occur when the oxygen sensor does not work; fuel injection